From: jstacey AT plato DOT wadham DOT ox DOT ac DOT uk (J-P)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Array of home-made class, C++ game
Date: 29 May 2000 12:40:24 +0100
Organization: Wadham College Oxford
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In article <8grfga$h00$1 AT nnrp2 DOT deja DOT com>,  <joel_hansell AT my-deja DOT com> wrote:
>In C++ class, I'm supposed to write a simple
>slalom game. 

Chances are that if you can pare down the code to the bit that causes the
crash, and repost it in comp.lang.c++, it'll be obvious to them,
especially if it's just a pointer problem that's stomping all over the
stack.

If you want to debug using gcc/RHIDE, it has its own very useful debugging
tool. Without wanting to be patronising, look at the "Debug" menu. F7/F8
combinations allow you to step through the code until *pow* - you get a
segmentation fault at the offending line.

>    Port level[]; /* array of Ports, should this
>be "Port* level[]" or even "Port[] level"?
>Perhaps I must define the size of the array, like
>"Port* level[5]"? /*

What you might want to do is define a pointer, Port *level. This pointer
can then be made to point to an array of any size you want with: 

  level = new Port[5];

  // ... 

  delete level[];

  // ...

  level = new Port[250];

Simply declaring Port level[] isn't (I think) proper C++; certainly it
rings alarm bells from this C programmer, but C++ is still a closed book
to me.

So: you can declare Port level[10], or Port *level, where the latter
allows you to change the size of the array starting at address "level".

J-P